TY - JOUR ID - 2954 TI - VCNC CONTOUR FOLLOWING TASKS USING ROBUST QFT CONTROLLER JO - Iranian Journal of Science and Technology Transactions of Mechanical Engineering JA - IJSTM LA - en SN - 2228-6187 AU - JAHANPOUR, J. AU - HONARI-TORSHIZI, M. AU - GHARIB, M. R. AD - Dept. of Mechanical Engineering, Mashhad Branch, Islamic Azad University, Mashhad, I. R. of Iran AD - Dept. of Mechanical Engineering, Ferdowsi University of Mashhad, Mashhad, I. R. of Iran Y1 - 2015 PY - 2015 VL - 39 IS - M1 SP - 131 EP - 145 KW - QFT controller KW - VCNC KW - NURBS interpolator KW - contour tracking KW - contour error DO - 10.22099/ijstm.2015.2954 N2 - In this paper, the Quantitative Feedback Theory (QFT) is proposed to design acontroller for feed drive of Virtual Computer Numerical Control (VCNC) systems. The designedrobust QFT controller is also compared to two commonly used controller design methods, i.e.Fuzzy Control (FC) and Sliding Mode Control (SMC), for contour tracking problem. The positioncommands required for contour following task are evaluated by the Non-Uniform Rational BSpline(NURBS) curve interpolator with the S-shape feedrate profile for two contours, i.e. "heart"and "omega" as the case studies. After modeling the feed drive of the VCNC system, the robustQFT controller and also FC and SMC controllers are designed to achieve the allowable tolerancecontour error. The simulation results for the "heart" and "omega" contour following tasks with theaforementioned controllers were analyzed and discussed. It is found that the designed QFTcontroller not only achieves the tight contour error but also yields better satisfactory performance,especially at the corners of the tool path, compared to the other controllers used in contourfollowing applications in VCNC systems. UR - https://ijstm.shirazu.ac.ir/article_2954.html L1 - https://ijstm.shirazu.ac.ir/article_2954_34ff59e25e131d3c6a2f80da3a33946e.pdf ER -